Macbook can't detect external display via DVI cable

I just bought Samsung PX2370 monitor and attempt to connect it with my Macbook Aluminum (late 2008). I have mini display port to DVI adapter and DVI cable. When I hook up my Mac, nothing comes up. The screen on macbook goes blue briefly and then back to normal, but nothing has been detected. I've manually set the source of signal to DVI, and tried to use Detect Display but nothing happens. Even I try to detect the monitor by using Windows 7 (via bootcamp), the display remains idle.
I had tested the monitor using DSLR although by HDMI, it work.
Any help would be much appreciated.

Hey hparekh and welcome to the forum -
It looks like you have the correct hardware. You should check your connections... make sure your using the Mini DisplayPort and not the Ethernet port (common mistake) and all of the connections are plugged completely. Make all of your connections with your MacBook on and then turn your Dell on. You might need to go through your Dell's setup to make sure that it's recognizing a DVI input rather then HDMI.
Might be a bad DVI cable or a defective monitor or maybe a bad Mini DisplayPort to DVI adapter. Are they all new products?

Similar Messages

MBPro won't detect external display on DVI

Hi Folks,
I have a strange problem that gives me quite some headache:
Is use a MacBook Pro 3,1 2.2 Ghz, 4GB RAM, 128MB NVidia something together with a Samsung SyncMaster 215TW.
For the past year I was using my external screen without any trouble, connecting it via DVI to the mac. Every night I turn down the lid putting the notebook in sleep mode and switch off the monitor. Exactly as I did yesterday. But this morning however the external display didn't wake up as usual it did just nothing - was not even detected via the detect display function. And this is still the case right now.
So when I plug (or unplug) the DVI to the external something is still going on. I get the blue screen (don't get that wrong that used to appear just before it would expand the desktop to the external screen, but then it switches back as if there would be nothing connected.
No relevant entries in any logfile. System Profiler shows "Status: No display connected". The display itself says some no connection message if unplugged and - get this - falls to sleep mode right after I plugin the dvi connector to the mac.
I tried all this:
-reboot (with display connected & without display connected and all other imaginable combinations) - no positive result
-the display via DVI-VGA adapter works (but the image is not as nice unfortunately)
-reset PRAM (boot with optioncommand+PR)
-reset the entire thing (no power, no battery and hold the powerkey for 10 secs.) nothing
-connect some other external display to the mac via DVI - works perfectly
-connect the display via DVI to an other macbook pro computer - works perfectly too
-hard reset the display via the (red) support menu - no result
-an other DVI cable - no result
-booted from the leopard install cd - same thing
-booted from an other harddisk with 10.4.10 (removing the internal disk)- same strange behaviour with the old system
-booted ubuntu linux 8.04 - even here the same problem X doesn't recognize the external display if it is attached to the DVI port also no entries to the logs here.
-SwitchResX and tried to reset the display setting from there (vendor id 4c2d & product id 213 & 214) but still no success.
- called the apple support and my distributer of trust - no ideas but could be a hardware fault (mmh ok... but why do all other display I tried work perfectly with that beast of macbook pro but not any SyncMaster 215TW?!? that worked great for the whole last year)
I guess the macbook had a very bad dream that very last night about mac eating foo-bars that crawl through DVI cables from any 215TW display.
As for now I have a date with the local apple service partner -- in three weeks (it's holiday time in g.o. germany). Don't know what to tell him: Probably I'll need to go there with the screen to show them the entire scenario. Hopefully they (still) think it's a problem with faulty apple hardware (or system software) and replace the logic board.
But I'm still in hope! Is there anybody out there having an idea with what I could try next to bring back the love between my macbook and the lovely 215TW display?
greetings,
brutus banane

I have recently bough a new Macbook Pro 15.4", it worked first time with a Samsung Syncmaster 2493HM but after a few days the 'detect display' utility ceased to connect, then a short while after on start up I was getting a blank screen with a flashing folder with '?' on it, preventing me from booting up successfully.
I tried the reset p-ram, didn't work then I tried an archive install of OSX and that ironed out all the creases - for a day, there has been no flashing folders on start up but the Samsung has failed to be detected and this morning wouldn't work no matter how many restarts or cable disconnecting attempts.
So I called Apple helpline, told the guy what had happened, he mentioned to try the install discs again with the display connected to see of the MBP sent a signal to it, after choosing the language in the OSX installer, the display was once again recognized! I didn't have to proceed any further with the install discs so quit, reset and ejected the install discs and all seems well again.
For how long i wonder?
I have no idea of this will work for anyone else but it works for me at the moment.
Interested to see when and how this finally gets solved!
T.
Message was edited by: Tyke Tyler
Message was edited by: Tyke Tyler

Macbook will not detect external display

Was using a $7 aftermarket minidisplay port to HDMI cable with success for about 2 months with no problems detecting external display. Started having problems (it would randomly detect until it eventually would not at all) and tried all solutions I could find in discussion boards to no avail. I recently bought a $40 cable from the apple store and it worked fine for about a month and now it only recognizes my external display about 50% of the time (which is how the problem began the first time). Very frustrating! What is the deal here?

Did you have any luck resolving this? I have had exactly the same issue when updating the EFI Firmware to Version 2.8 (the latest for a Mid-2013 MacBook Air 6.2 model) - MBA61.0099.B12
I've tried flushing the NVRAM/PRAM and also resetting the SMC but no joy. I'm trying to drive an AOC Q2963 monitor using a display port connector. Annoyingly, I don't think there's a way to rollback to a previous firmware version.

Hello Apple Fix the display issue. MAcbooks suddenly stop detecting external display!!!

Bought another new minidisplay to HDMI and suddenly stopped detecting external display! However, it works randomly with no rhyme or reason. I have tried everything.

No answer

Macbook won't detect external display anymore - Random shutdown injury??

Hi,
my Macbook has the dreaded random shutdown thing happening, often it can't even get through the startup sequence. If I reset the PMU and PRAM and check the disk every week I can keep it running. Applecare are making not particularly helpful suggestions like "run it in safe mode" - hello people, random means it can take days to happen again... I use this computer for work so I need it at full capacity every day!!!
Anyway, enough angry ranting. The casualty of today's RS and subsequent PRAM PMU resetting is my external display (Viewsonic LCD). The macbook is no longer sending signals to it (display says "no signal"). When I ask the macbook to "detect displays" nothing happens. I have restarted the macbook several times and unplugged and replugged the display connection it doesn't help. Yes, I have the AC power cable plugged in on the Macbook (I know it doesn't like talking to the screen if I don't).
The display and macbook have always worked fine together in the past...
Does anyone have any suggestions on how to test for causes or fix this display related problem?
MacBook Mac OS X (10.4.8)
Powerbook G4 Mac OS X (10.4.2)

You don't mention ever having brought the problem to Apple's attention, or what resulted from your request for Apple's help with it. This isn't a universal or widespread problem. It may be a hardware fault in your own equipment that needs to be resolved with a repair, or it may be a software problem (corrupt file, incompatible software conflict, update needed, etc., etc.). You seem to think Apple should have fixed it for you without your lifting a finger, and you're eager to complain about Apple's lack of support. But you've offered nothing to indicate that Apple even knows you need support. You do have to ask for it. Have you done so?
We have no idea what steps you've taken to try to narrow down the possibilities, e.g., making sure the monitor is turned on; trying a different video cable as iVmichael has suggested; testing the monitor with the same cable on a different computer; testing a different monitor with the same cable and then with a diferent cable on your computer; substituting a different cable adapter, if you are using one; applying all applicable system software updates and then Repairing Permissions and Repairing Disk; starting in Safe Mode and seeing whether the monitor is recognized and activated then; seeing whether the monitor is detected in System Profiler; and so on. You may have done some of these things, but you haven't told us about them or about the results.

Macbook Pro not detecting external display

I can't seem to make this work. I'm using a MiniDP-DVI cable which is plugged into an DVI cable plugged into an external monitor. I know it works because I have tried it on other computers and it has worked on the Macbook (erratically).
I've reset the PRAM several times and it has not fixed the problem. I did it in this order:
1. Remove adapter from computer
2. Shutdown
3. Press Option Command P R until the second chime is heard.
4. Log on as usual
5. Reconnect adapter to MBP
This is what the system log states when I plug the adapter in:
Oct 27 20:47:01 SMBP.local WindowServer[80]: Received display connect changed for display 0x42732c0
Oct 27 20:47:01 SMBP.local WindowServer[80]: Created shield window 0x66 for display 0x042732c0
Oct 27 20:47:01 SMBP.local WindowServer[80]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1
Oct 27 20:47:01 SMBP.local WindowServer[80]: Received display connect changed for display 0x3f003d
Oct 27 20:47:01 SMBP.local WindowServer[80]: Received display connect changed for display 0x3f003e
Oct 27 20:47:01 SMBP.local WindowServer[80]: Received display connect changed for display 0x3f003f
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x042732c0: GL mask 0x1; bounds (0, 0)[1280 x 800], 9 modes available
          Main, Active, on-line, enabled, built-in, boot, OpenGL-accel, Vendor 610, Model 9ccb, S/N 0, Unit 0, Rotation 0
          UUID 0x0000061000009ccb00000000042732c0, ColorProfile { 3, "Color LCD Calibrated 2012-06-28"}
Oct 27 20:47:02 SMBP.local WindowServer[80]: GLCompositor: GL renderer id 0x01024301, GL mask 0x0000000f, accelerator 0x00004333, unit 0, caps QEX|QGL|MIPMAP, vram 451 MB
          texture units 8, texture max 8192, viewport max {8192, 8192}, extensions FPRG|NPOT|GLSL|FLOAT
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003f: GL mask 0x8; bounds (2304, 0)[1 x 1], 1 modes available
          off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 3, Rotation 0
          UUID 0xffffffffffffffffffffffff003f003f
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003e: GL mask 0x4; bounds (2305, 0)[1 x 1], 1 modes available
          off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 2, Rotation 0
          UUID 0xffffffffffffffffffffffff003f003e
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003d: GL mask 0x2; bounds (2306, 0)[1 x 1], 1 modes available
          off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 1, Rotation 0
          UUID 0xffffffffffffffffffffffff003f003d
Oct 27 20:47:02 SMBP.local WindowServer[80]: Created shield window 0x68 for display 0x042732c0
Oct 27 20:47:02 SMBP.local WindowServer[80]: Created shield window 0x69 for display 0x003f003f
Oct 27 20:47:02 SMBP.local WindowServer[80]: Created shield window 0x6a for display 0x003f003e
Oct 27 20:47:02 SMBP.local WindowServer[80]: Created shield window 0x6b for display 0x003f003d
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x042732c0: MappedDisplay Unit 0: Startup Mode 1280 x 800, CGSThirtytwoBitColor, Resolution 1, IOMode 0x80000000, IODepth 0x0, IOReturn 0x0
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display added
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display removed
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x042732c0: GL mask 0x1; bounds (0, 0)[1280 x 800], 9 modes available
          Main, Active, on-line, enabled, built-in, boot, OpenGL-accel, Vendor 610, Model 9ccb, S/N 0, Unit 0, Rotation 0
          UUID 0x0000061000009ccb00000000042732c0, ColorProfile { 3, "Color LCD Calibrated 2012-06-28"}
Oct 27 20:47:02 SMBP.local WindowServer[80]: GLCompositor: GL renderer id 0x01024301, GL mask 0x0000000f, accelerator 0x00004333, unit 0, caps QEX|QGL|MIPMAP, vram 451 MB
          texture units 8, texture max 8192, viewport max {8192, 8192}, extensions FPRG|NPOT|GLSL|FLOAT
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003f: GL mask 0x8; bounds (2304, 0)[1 x 1], 1 modes available
          off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 3, Rotation 0
          UUID 0xffffffffffffffffffffffff003f003f
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003e: GL mask 0x4; bounds (2305, 0)[1 x 1], 1 modes available
          off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 2, Rotation 0
          UUID 0xffffffffffffffffffffffff003f003e
Oct 27 20:47:02 SMBP.local WindowServer[80]: Display 0x003f003d: GL mask 0x2; bounds (2306, 0)[1 x 1], 1 modes available
          off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 1, Rotation 0
          UUID 0xffffffffffffffffffffffff003f003d
Oct 27 20:47:03 SMBP.local WindowServer[80]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
Oct 27 20:47:03 SMBP.local WindowServer[80]: Display 0x042732c0: MappedDisplay Unit 0; ColorProfile { 3, "Color LCD Calibrated 2012-06-28"}; TransferTable (256, 3)
Oct 27 20:47:04 --- last message repeated 1 time ---
Oct 27 20:47:04 SMBP.local WindowServer[80]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
Oct 27 20:47:04 SMBP.local WindowServer[80]: Display 0x042732c0: MappedDisplay Unit 0; ColorProfile { 3, "Color LCD Calibrated 2012-06-28"}; TransferTable (256, 3)

I had the exact same behavior and log and I solved the issue by replacing the MiniDP-DVI adapter. I tried the "broken" adapter on another set of laptop+display and it was working there, so that made me think the adapter was ok, when apparently it was not.

External display (via DVI) takes 10 minutes to turn on

Hi!
We have a 15" G4 Powerbook about 16 months old. We often use it with an external (non-Apple) LCD monitor, in dual mode, via DVI. For most of the time we've had the PB, there was no problem at all. However, in the past few months a puzzling problem has developed. When the monitor is plugged into the PB's DVI port, the PB will believe there are two monitors available but it will not send any signal to the external monitor at first. After about 10 minutes, it will suddenly start sending a signal to the external monitor and everything is fine. However, if the PB subsequently is allowed to go into sleep mode, upon resuming it again refuses to send a signal to the external monitor for about 10 minutes.
Any idea what is going on and how this might be fixed? It's really frustrating.
Thanks!
G4 AlPB 15" Mac OS X (10.3.3)

I think I have this problem as well, I keep using the PB with LCD projectors, again they are detected, but I can't get an output.
Not sure I get anything after ten minutes though, I'll leave it today to try it.

MacBook no longer detects external display

When I hook my computer up in my home office I connect an external display using the Apple VGA dongle.
Previously, when I inserted the dongle the display would blank out for a moment while detecting the display, then reappear with the VGA output enabled. This is no longer the case. When I insert the dongle, my screen doesn't blank out, and the VGA output will not enable. Its like it doesn't even know I'm inserting the dongle.
I have inspected the dongle for broken pins and dirt, but it appears to be making a good connection.
Is there something wrong with my Mac, or is it the dongle? Is it worth taking this to a genius bar in hopes they can try a different dongle, or shed some light on the situation? Thanks in advance.

Try plugging the display in and then going to System Preferences>Displays and clicking the "Detect Displays" button.

Macbook Air stopped detecting external displays

My MBA (Mid 2011) has stopped detecting ANY external display. Have tried different leads (MDP > HDMI and VGA) with no luch, My MBA (Mid 2011) has stopped detecting ANY external display. Have tried different leads (MDP > HDMI and VGA) with no luck. It seems to have happened since I have updated to Mountain Lion a few days ago.
Has anyone had similar problems?

You should also ask this in the MacBook Air forum. This is the forum for the white and black plastic MacBooks that were discontinued in 2010. You should also post this question there to increase your chances of getting an answer.
https://discussions.apple.com/community/notebooks/macbook_air
And the Mountain Lion Forum https://discussions.apple.com/community/mac_os/os_x_mountain_lion

How to get new Macbook Pro Retina (late 2013) to detect external monitor via HDMI?

Hi everyone, this is my first Mac and for the most part it's been really, really wonderful.
This is my first major glitch: I cannot get it to detect my external display: It is an ASUS PA248Q, manufactured Aug 2012.
The HDMI cable according to my Amazon history is at least 1.3c from 2010, "Fanatic Digital Imperial Series Gold-Plated HDMI Cable (6 feet)".
It works with perfectly connecting an AmazonTV box to an old Samsung TV, with vivid clarity, unlike our cableTV signal.
Just in case, I have a new HDMI cable on order, which claims to be of newest standards.
The Macbook Pro Retina (late 2013) has the standard Intel Iris from the Haswell chips, as well as Nvidia GT 750M, the latter which I don't think has been used yet.
The ASUS display says: HDMI NO SIGNAL.
I have tried shutting them down and replugging the cable. I don't know what the ideal order is. The Macbook Pro is plugged into AC power, as suggested.
In System Preferences>Display, I press the Option key to select "Detect Displays" option (seriously unintuitive).
I have also tried resetting the NVRAM:
I shut the machine down. Pressed the power button, then quickly held the quadruplet: Option-Command-P-R (a double handful) and waited for the machine to chime a 2nd time. Tried to detect external display no luck.
Next, I reset the SMC:
I shut the machine down. Then I pressed Shift-Control-Option-Power for about 5 to 10s. Then I turned on the machine normally.
NVRAM & SMC steps were from an old youtube video, as the instructions I had did not explain how to do so clearly.
Please let me know if I"m doing something wrong.
Seems so exorbitant to pay $350 for Apple Care; that's a the cost for a whole new cheap laptop.
I will search the forums again. If anyone answers this, thank so much!

Hello there, willr314.
It sounds like you've covered most of the practical steps found in this Knowledge Base article:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573#1
No video or no signal, image distortion, "snow," or flickering
Check connections
When using an external display be sure to check the following:
If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
Monitor and Display Adapter Table
About Mini DisplayPort to HDMI adapters
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Thunderbolt ports and displays: Frequently asked questions (FAQ)
Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
Try unplugging the video adapter or cable and then plug it back in.
If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).
Reset the system
You can reset the Mac's parameter RAM and SMC.Reset the resolutionStart by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
The article does offer some additional links and recommendations as well:
These articles may offer additional assistance and information about displays and video adapters:
Apple Portables: How to use your computer in closed lid mode with an external display
Apple Cinema Display (30-inch DVI) has 1280 x 800 as the maximum available resolution
Mac Pro (Early 2009), Mac Pro (Mid 2010): Supported display configurations
For assistance with Retina displays, please see Frequently asked questions about using a Retina display.
If you tried all of these steps for your display and the video issues persist, contact Apple technical support or take your Apple computer to the nearest Apple Store or Apple Authorized Service Provider (AASP) for diagnosis. If you plan to visit an Apple Retail Store, make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/ (available in some countries only).
Note: Diagnostic fees may apply for issues not covered under warranty or the AppleCare Protection Plan (APP).
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Thinkpad Edge S430 - Windows does not detect external display connected via HDMI

On a Thinkpad S430 with HD4000 integrated graphics, an external display connected via a HDMI cable is not detected at all when using Windows. The system is fully updated as of the time of posting this message, both via the Lenovo Update tool as well as Windows update.
The Intel driver version is 8.15.10.2696. It appears that this is the latest version, since it does not offer an update when I try to auto-update it via Device Manager.
NB: I am running Ubuntu 12.04 with kernel 3.4.0 on the same machine, and the external display works perfectly fine with this software configuration.
Hence I think that it's very likely that this is a Windows-specific driver issue.
Would Lenovo happen to have a driver update in the works? Alternatively, I will be thankful for any suggestions about possible resolution of this problem.

skn2011 wrote:
My Macbook Pro notbook 13.3" does not detect external display throught it's mini display port to HDMI connector when connected to Sony Bravia 32" LCD TV.Can anyone help me get the answer as i tried reading everywhere on internet and none does not seems to work.Please help me out guys.
Are you using the Apple adaptor or a 3rd party

HT5167 after I updated to 10.7.4 my macbook pro 2011 doesn't detect external display anymore what should I do?

after I updated to 10.7.4 my macbook pro 2011 doesn't detect external display anymore what should I do?

after I updated to 10.7.4 my macbook pro 2011 doesn't detect external display anymore what should I do?

My external display via VGA only works when macbook air is shut?

I'm using a MDP to VGA to connect my 2012 Macbook Air to an external display. When the Air is open I can view only the desktop (no open apps). The open apps only appear on the external monitor when I close the Air (after a couple of seconds)!! Have I accidently altered some settings somewhere??? Makes no sense to me.

Update - I ended up spending about an hour on the phone with a very helpful rep from AppleCare. He was also stumped by this problem. We ended up solving it by using a remote screen-share app that allowed him to see what my video card was sending to the external display, and he directed me over the phone to change the settings (quite funny really - it was literally "move your mouse up a tiny bit, now click, now left, etc).
So, my problem is solved for now, albeit in a very cumbersome way. Still amazed that there's no way to fix this properly.

My mid-2010 10.8.2 iMac won't detect external displays.

My mid-2010 10.8.2 iMac won't detect external displays. I've tried using a third-party minidisplay port to DVI adapter, as well as an Apple-brand minidisplay port to VGA adapter. The monitor I'm using is a Dell SP2008WFPt. It is a functional monitor. I've tried resetting the PRAM, repairing my disk permissions, rebooting, and doing all sorts of wacky stuff with the order I plug things in. Is there a solution? It seems like lots of folks are having the same problem.
Thanks! This is really starting to make me angry.

If 10.7.0 or later...
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.
If that doesn't help Reinstall the OS.

Broken LCD - Can not get external Display

My screen is no longer good so im trying to connect a external display.
Been trying for hours trying to get the external display to work of boot.
Ive tryed everything changing 2 sets of hd cables and svga cables. The funcion key.
The Laptop does reconize the display but seems to go into powersave mode or something.
The only way i can get the external display to work is if i pull the battery and wait a bit then power
up the display will work with a notice on the screen that cmos will be reset to defaults then restarts
and back to where i was again... Im thinking it something in the bios thats causing this.
Thank you and hope i can figure this out.
Pavillion dm4-1160us
This question was solved.
View Solution.

HI Ezfilez,
I understand you are having an issue with the external display on your Windows 7 computer.
Sometimes it is in the BIOS. If you follow the link and update it should help resolve your issue.
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=bph07110
Please let me know if you require further assistance.
Thanks
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

Macbook can't detect external display via DVI cable

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